/Engine/Source/Runtime/TypedElementFramework/Public/Elements/Interfaces/TypedElementQueryStorageInterfaces.h
Adds new empty columns to a row of the provided type. The addition will not be immediately done but delayed until the end of the tick group.
template<typename... Columns> void AddColumns ( TConstArrayView< [RowHandle](API\Runtime\TypedElementFramework\Elements\Common\RowHandle) > Rows )